001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018package org.apache.hadoop.hbase.regionserver.compactions;
019
020import java.util.ArrayList;
021import java.util.Iterator;
022import java.util.List;
023import org.apache.hadoop.hbase.regionserver.HStoreFile;
024
025class SinusoidalFileListGenerator extends StoreFileListGenerator {
026
027  @Override
028  public Iterator<List<HStoreFile>> iterator() {
029    return new Iterator<List<HStoreFile>>() {
030      private int count = 0;
031
032      @Override
033      public boolean hasNext() {
034        return count < MAX_FILE_GEN_ITERS;
035      }
036
037      @Override
038      public List<HStoreFile> next() {
039        count += 1;
040        ArrayList<HStoreFile> files = new ArrayList<>(NUM_FILES_GEN);
041        for (int x = 0; x < NUM_FILES_GEN; x++) {
042          int fileSize = (int) Math.abs(64 * Math.sin((Math.PI * x) / 50.0)) + 1;
043          files.add(createMockStoreFile(fileSize));
044        }
045        return files;
046      }
047
048      @Override
049      public void remove() {
050      }
051    };
052  }
053
054}